In this episode of Crash Course Psychology, Hank takes a look at WAIS and WISC intelligence tests and how bias can really skew both results and the usefulness of those results. Want more videos about psychology? Check out our sister channel SciShow Psych at null! -- Chapters: Introduction 00:00 WAIS & WISC Tests 1:09 Standardized Tests 2:08 Reliability & Validity 3:46 Twin & Adoption Studies - Genetics of Intelligence 4:40 Environmental Influences on Intelligence 6:55 Testing Bias 8:05 Stereotype Threat 8:57 Review & Credits 10:16 -- Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Instagram - https://www.instagram.com/thecrashcourse/ CC Kids: null